/*
 * Copyright (c) 2012 swing-on-fire Team
 * 
 * This file is part of Swing-On-Fire (http://code.google.com/p/swing-on-fire), licensed under the terms of the MIT
 * License (MIT).
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
 * Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package com.google.code.swingonfire.component.page.old;

import java.awt.Component;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;

import com.google.code.swingonfire.animation.AnimationUtil;
import com.google.code.swingonfire.image.ComponentBufferImageProvider;
import com.google.code.swingonfire.image.ImageProvider;
import com.google.code.swingonfire.image.NullImageProvider;

public class JPageTransitionAnimation extends AbstractJPageAnimation
{

    private final ImageProvider nextImageProvider;
    private final ImageProvider previousImageProvider;

    private final JPageTransition nextTransition;
    private final JPageTransition previousTransition;

    public JPageTransitionAnimation(double duration, JPageTransition nextTransition,
        JPageTransition previousTransition, Component pageComponent, Component nextComponent,
        Component previousComponent)
    {
        super(duration, pageComponent, nextComponent, previousComponent);

        nextImageProvider =
            (nextComponent != null) ? new ComponentBufferImageProvider(nextComponent, isImageProviderTransparent())
                : new NullImageProvider();
        previousImageProvider =
            (previousComponent != null) ? new ComponentBufferImageProvider(previousComponent,
                isImageProviderTransparent()) : new NullImageProvider();

        this.nextTransition = nextTransition;
        this.previousTransition = previousTransition;

        nextTransition.reset();
        previousTransition.reset();

        getNextImage();
        getPreviousImage();
    }

    public Image getNextImage()
    {
        return nextImageProvider.getImage();
    }

    public Image getPreviousImage()
    {
        return previousImageProvider.getImage();
    }

    protected boolean isImageProviderTransparent()
    {
        // FIXME: ok, here comes a hard one: if the image is transparent, then the LCD Subpixel-Sampling
        // setting differs from the system one, which will lead to not so nice font rendering
        return false;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public double animationStep(double delay, double time, double fraction)
    {
        nextTransition.step(getDuration(), time, fraction);
        previousTransition.step(getDuration(), time, fraction);

        return AnimationUtil.animationResult(0, time, getDuration());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void renderAnimation(Graphics2D g, int width, int height)
    {
        g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);

        Image nextImage = getNextImage();
        Image previousImage = getPreviousImage();

        if (previousImage != null)
        {
            previousTransition.render((Graphics2D) g.create(), previousImage, width, height);
        }

        if (nextImage != null)
        {
            nextTransition.render((Graphics2D) g.create(), nextImage, width, height);
        }
    }

}
